Pitman for looms.



N. FISH & P. WARREN.

PITMAN FOR Looms. APPLICATION FILED JULY 7.1915- 1,179,171. PatentedApr. 11,1916,

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NATHANIEL FISH AND PERCY WARREN, 0F DARWEN, ENGLAND.

PITMAN FOR LOQMS.

Application filed July 7, 1915.

T 0 all whom it may concern Be it known that we, NATHANIEL FISH, ofHanover Street Mill, and PERCY WARREN, of 90 Cemetery road, both ofDarwen, in the county of Lancashire, England, subjects of the King ofGreat Britain, have invented new and useful Improvements in and Relatingto Pitmen for Looms; and we do hereby declare the following to be afull, clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

This invention relates to a pitman for looms of the type which efiectadjustments to the brasses at both ends by means of a pair of oppositelydisposed straps capable of being drawn together or telescoped one withinthe other to a varying degree by means of a cotter or its equivalent.

The object of this invention is to improve upon pitmen of the above typeby the provision of means whereby the pressure exerted by the cotter orthe like is transmitted to as large a surface as possible with a view toobtaining a direct and even thrust thus minimizing as far aspracticable, the wear on the straps.

The improvements according to this invention consist in forming, uponthe outer strap, heel pieces which extend the width thereof, and furtherin the provision of a preferably squared bolt having a head formed onone end and a nut and washer engageable on the other of a shape and sizeto correspond with the above said heel pieces against which latter boththe head and the washer of the said bolt is forced by the usual cotteror its equivalent.

To enable the invention to be more readily understood we will nowproceed to describe the same in detail by aid of the accompanyingdrawings in which Figure 1 is a plan view of the complete device andFig. 2 a central longitudinal section thereof.

The pitman a is shaped to receive two straps Z) and c which when inposition thereon overlap each other at their inner ends. Within the arma and the two straps b and c are slots (Z and (Z respectively which passvertically and longitudinally therethrough and so arranged andpositioned in each individual member as to correspond when such membersare assembled; the point of cor- Specification of Letters Patent.

Patented Apr. 11, 1916.

Serial No. 38,480.

respondence, in the present example, being approximately central of thedevice, or the same may be otherwise positioned to suit individualrequirements.

The strap b .which is constructed preferably although not necessarily inone piece of metal, forged to shape, is provided at its extremities withheel pieces 6 which project outwardly from the body of the strap so asto leave a clean and continuous inner surface thereto, the end of whichheel pieces extend the whole width of the strap. The purpose of theseheel pieces will be described hereafter.

In the example under consideration and shown in the drawings the arm ais cast or forged, in one piece with semi-circular recesses formed atboth ends to receive and act as a support for the usual split brasses.

When in the assembled positions with the slots d and d co-incident apreferably square bolt f is passed therethrough which bolt is formedwith a rectangular head f the longest side of which is equal to thewidth of the straps b and c; it is secured in position by a nut and awasher P which washer is similarly shaped to the head f. When this hasbeen tightened up so as to press upon the surface of the strap 6 with agentle but sufficient pressure, the complete bolt is forcedup againstthe heel piece 6 either by hand or by aid of the cotter g which when inposition presses over one side against the head and washer f and frespectively and on its other side against the forward edge of the slotsd in the strap 0.

It will thus be seen that the forced entry of the cotter 9 through thecoinciding slots has the efiFect of drawing both straps b and c inwardor toward each other with the consequent adjustment of both the brassesat each end of the arm a.

By reason of the simplicity in adjustment the herein described device isparticularly suitable for use in looms where a loose and non-rigidpitman is often instrumental in demoralizing the beat up with theconsequential production of thick and thin places :in the cloth. WViththe employment of the present invention this defect is overcome by thereadiness with which the same may be adjusted even during its operation.Furthermore, by reason of the ample surfaces of contact provided theWear and tear consequent upon the continual adjustment of the cotter isreduced to the minimum.

What We do claim as our invention and desire to secure by Letters Patentis A pitman for looms comprising a pair of straps one of Which has itsinner end disposed Within the inner end of the other strap and saidinner ends being provided with openings, said last named strap havinglateral heels on its inner end of a Width equal to the Width of thestrap, a bolt eX- tending through said openings and having a headbearing against and of a Width equal to the adjacent heel, a Washer onthe bolt bearing against and of a Width equal to the other heel, and acotter engaged through said openings and operating to telescope thestraps.

In testimony whereof We have signed our names to this specification inthe presence of two subscribing witnesses.

NATHANIEL FISH. PERCY WARREN.

Witnesses MALCOLM SMETHURST, GEORGE WVEAVER.

flopies of this patent may be obtained for five cents each, byaddressing the Commissioner of I'atents, Washington, D. G.

